package com.itheima.mapper;

import com.itheima.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface DeptMapper {
//查询所有部门数据
//    方法一:手动结果映射
    @Results({
            @Result(column="create_time",property="createTime"),
            @Result(column="update_time",property="updateTime")
    })
//    方法二:起别名
//    @Select("select id, name, create_time createTime, update_time updateTime from dept order by update_time desc;")
//    方法三:使用驼峰命名映射开关
    @Select("select id, name, create_time , update_time  from dept order by update_time desc;")
    List<Dept> findAll();

//    根据ID删除部门
    @Delete("delete from dept where id=#{id}")
    void deleteById(Integer id);

    @Insert("insert into dept(name,create_time,update_time) values(#{name},#{createTime},#{updateTime})")
    void insert (Dept dept);

    @Select("select id, name, create_time , update_time  from dept where id=#{id}")
    Dept getById(Integer id);

@Update("update dept set name=#{name},update_time=#{updateTime} where id=#{id}")
    void update(Dept dept);
}